Arduino Project LED Light Bar

LED Light Bar

Breadboard

Shematic

Code

1. void setup() {
2. for (int i = 2; i < 9; i++) { // Choose pins 2-8
3. pinMode(i, OUTPUT); // Set the pins as outputs
4. }
5. }
6. // Define function to turn off all LEDs at the same time
7. void allLEDsOff(void) {
8. for (int i = 2; i < 9; i++) {
9. digitalWrite(i, LOW);
10. }
11. }
12. // Switch on LEDs in sequence from left to right
13. void loop() {
14. for (int i = 2; i < 8; i++) { // Run loop once for each LED
15. allLEDsOff(); // Turn off all LEDs
16. digitalWrite(i, HIGH); // Turn on current LED
17. delay(200); // Delay of 200 ms,
18. // then repeat loop to move on to next LED
19. }
20. for (int i = 8; i > 2; i--) { // Light LEDs from right to left
21. allLEDsOff();
22. digitalWrite(i, HIGH);
23. delay(200);
24. }
25. }